2012 Toyota Prius Owners Manual - Page 758

5-2. Steps to take in an emergency Have the malfunction repaired immediately. (vehicles with a smart key system) After taking the specified steps to correct the suspected problem, check that the warning message and light go off. Interior buzzer Exterior buzzer Warning message Details The electronic key is not detected when an attempt is made to start the hybrid system. Correction procedure Once ⎯ (Flashes) Start the hybrid system with the electronic key present. 5 When trouble arises 449